If open or short to ground in signal circuit of rear lambda sensor is detected, ECM sets DTC P22AC00.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Voltage monitoring | 1. Poor connector connection 2. Open or short to ground in signal circuit of rear lambda sensor 3. Defected rear lambda sensor | |
Enable Condition |
•
Engine running | ||
Threshold Value |
•
Open in Nernst cell line
•
Open in Pumping cell line
•
Output signal is belwo 0.2V
•
Short to ground in signal circuit (Pumping cell, Current adjust, Virtual ground, Nernst cell) | ||
Detecting Time |
•
1 sec | ||
Fail Safe | Engine OFF |
•
No | |
EGR OFF |
•
No | ||
Torque Limit |
•
No | ||
MIL |
•
On | ||
